Hello people,
(speaking in UNO, another arduino can have more tx)
Well ... my TX pin just burned, so I could set another digital pin - with code, I do not know - for this job?
If yes, how?
If not, why?
Thank you
You are out of luck because you can't reprogram the UNO without that pin.
The AVR hardware has a lot of digital pins. Some of those pins have additional modules attached to them. For example, the Serial TX. This is designed into the silicon, so it can't be changed in software.
Other hardware, such as the Teensy 3.2 can select from two pins to use for Serial TX.
Some chips really can select any pin. They don't have dedicated Serial hardware, rather it is more like SoftwareSerial.
It may be possible for you to use SoftwareSerial to get around the problem you're having. Look it up in the Arduino reference.
SoftwareSerial would get around this issue but you would have to have another way to reprogram your Arduino.
MorganS:
You are out of luck because you can't reprogram the UNO without that pin.The AVR hardware has a lot of digital pins. Some of those pins have additional modules attached to them. For example, the Serial TX. This is designed into the silicon, so it can't be changed in software.
Other hardware, such as the Teensy 3.2 can select from two pins to use for Serial TX.
Some chips really can select any pin. They don't have dedicated Serial hardware, rather it is more like SoftwareSerial.
It may be possible for you to use SoftwareSerial to get around the problem you're having. Look it up in the Arduino reference.
ok, so if i have tx and rx saved, its possible make another tx or rx? (and SoftwareSerial it's the answer?)
I think see a GPS using d3 - or d4 - wich tx.
I will look about SoftwareSerial anyway.
thank you for the clarification.
If your Uno has the DIP version of the 328P micro, you can easily replace it with a new one.
If you replace the 328P, make sure to get one with the bootloader already installed or at least have a way to install a bootloader or you will just be back here with more questions.
You need neither the USART nor a bootloader to program the 328.
DKWatson:
You need neither the USART nor a bootloader to program the 328.
In general, a commercial ROM Programmer is good enough to program a 328 chip; but here, the thread is talking about the 328 chip of the Arduino UNO Board and the IDE Environment. Therefore, to program the 328/P of this context, we need a functional UART Port of the chip and a pre-fused Boot Loader Program into it.
GolamMostafa:
Therefore, to program the 328/P of this context, we need a functional UART Port of the chip and a pre-fused Boot Loader Program into it.
No.
If the above were true, a bootloader could not be written to an empty chip by the IDE.
Whandall:
No.If the above were true, a bootloader could not be written to an empty chip by the IDE.
GolamMostafa:
Therefore, to program the 328/P of this context, we need a functional UART Port of the chip and a pre-fused Boot Loader Program into it.
By saying 'to program the 328/P of this context', I have wanted to mean 'the uploading of user application program -- the sketch'.
Uploading process into the on-board ATmega328P chip will only be successful if the chip contains a pre-fused Boot Loader Program and a functional UART Port.
I have no idea how one can fuse the Boot Loader Program into an empty (fully erased) ATmega328P Chip by the IDE when the empty chip (considering DIP Package) is placed in the 28-pin socket of the Arduino UNO. I have heard that the Boot Loader Program is fused into an empty chip using IDE's ISP Sketch. (I have not tried it for myself.)
GolamMostafa:
By saying 'to program the 328/P of this context', I have wanted to mean 'the uploading of user application program -- the sketch'.
Which also is not true, it can be done via the ICSP* header just the like.
It's the most native way to program a 328p.
*The clue is in the acronym - ICSP = In-Circuit Serial Programming
Now, it is the time for me to be familiar with the procedures of 'Storing a Boot Loader Program into the Boot Section' of an empty ATmega328P Chip and then use this chip (by placing it into the 28-pin socket of Arduino UNO) to upload sketch into the Application Section.
I would be highly glad for your kindness to post the steps.
GolamMostafa:
I would be highly glad for your kindness to post the steps.
No, the OP will not get a Tx pin by that and I feel you only want to cover up your eloquent misinformation.
If your interested you could read Uploading Arduino Sketches with Arduino as ISP programmer,
one case where the sketch was uploaded via ICSP and IDE.
If we can get back to the OP's original question: they should seriously contemplate getting an entirely new Uno. If an important pin has burnt out, there's a high chance something else is damaged. Maybe something is still kinda sorta working but intermittently cuts out or throws some other curveball.
Troubleshooting a buggy sketch can be tough enough already. No-one needs the additional bafflement of intermittently malfunctioning hardware.
I requested for your own steps; instead, you have referred me to the steps of 3rd Party for which I am unable to extend my appreciation to your honor.
Please, do a favor for me by providing these stuff:
1. The only Boot Loader Program (totally separated from a sketch) for Arduino UNO.
2. The steps (that you own) to be followed to fuse the program of Step-1 into the Boot Section of a fully erased (empty) 28-pin ATmega328P Chip after placing the chip into the 28-pin socket of the UNO.
Thanks in advance.
GolamMostafa:
@WhandallNow, it is the time for me to be familiar with the procedures of 'Storing a Boot Loader Program into the Boot Section' of an empty ATmega328P Chip and then use this chip (by placing it into the 28-pin socket of Arduino UNO) to upload sketch into the Application Section.
I would be highly glad for your kindness to post the steps.
It was already done long ago in many places. Here is my favorite, Nick's chip detect software alone is worth the trip.
Go through the tutorial and somewhere along the way you find that the bootloader is not necessary to load at all.
Nick also has more on loading hex files in another blog.
What loads to an AVR on a breadboard can also load to an AVR on a PCB with ICSP pins, every Arduino I know of.
GolamMostafa:
@WhandallI requested for your own steps; instead, you have referred me to the steps of 3rd Party for which I am unable to extend my appreciation to your honor.
English lesson for you: look up the word disingenuous.
So maybe you can honor Whandall for trying to point you in the right direction even if an hour wasn't spent kissing your ego.
GoForSmoke:
English lesson for you: look up the word disingenuous.So maybe you can honor Whandall for trying to point you in the right direction even if an hour wasn't spent kissing your ego.
And the following is just an appropriate one?
Whandall:
[...]I feel you only want to cover up your eloquent misinformation.
I really don't feel like spending time pointing out every little bit to someone who prefers to remain ignorant.
You're nothing like as smart as you pretend.